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E. L. HARMON.

TYPEWBITING MACHINE.

APPLICATION man man. I919.

Patented M316, 1921.

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3110a ntoz W Gm new Wane I E. L. HARMON.

TYPEWRITING MACHINE.

APPLICATION mso AUG-l2. m9.

Patented A118- 16, 1921.

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E. L. HARMUN.

TYPEWRITING MACHINE.

APPLICATION FILED AUG. 12, 1919.

Patented Aug. 16, 1921.

5 SHEETS-SHEET 3- E. L-. HARMON.

TYPEWRITING MACHINE.

APPLICATION FILED AUG-l2, 1919.

1,387,979. PatentedAug. 16,1921.

5 SHEETS-SHEET 4,

E. L. HARMON.

TYPE-WRITING MACHINE.

APPLICATION FILED AUG-l2} I9I9.

1387,979. Pa'behted Aug. 16, 1921.

5 SHEETS-SHEET 5- UNITED STATES PATENT OFFICE.

EDWIN L. HARMON, OF GROTON, NEW YORK, ASSIGNOR TO CORONA TYPEWRITER COMPANY, INC., OF GROTON, NEW YORK, A CORPORATION OF NEW YORK.

TYIPEWRI'IING-MAOHINE.

Specification of Letters Patent. Patented Aug. 16', 1921.

Application filed August 12, 1919. Serial No. 316,990.

T all whom it may concern:

Be it known that I, EDWIN L. HARMON, a citizen of the United States of America, and a resident of Groton, county of Tompkins, and State of New York, have invented certain new and useful Improvements in Typewriting-Machines, of which the following is a full and clear specification.

This invention has relation to that type of segment-shift covered by co-pending applications Petermann, Sr. 172,855, filed June 5, 1917, Armstrong, Sr. No. 256,675, filed Oct. 3, 1918, and Armstrong, Sr. No. 261,971, filed Nov. 11, 1918; and it has for its object the simplification and refinement of the mechanism with the special end in view that its cost of manufacture as well as assembly in the machine shall be reduced to a minimum, as more fully hereinafter set forth.

In the drawings- Figure 1 is a view partly in plan and partly in section showing the general arrangement of my inproved devices in a typewriting machine frame;

Fig. 2 is a side elevation of the mechanism, the parts being shown in normal position and the machine-frame being broken away; 1

Fig. 3 is a similar view showing the segment carrier pulled down to its intermediate position;

Fig. 4 is a similar view showing the segment carrier pulled down to its lowermost position;

Figs. 5, 6 and 7 are fragmentary front views showing the parts respectively in the positions shown in Figs. 2, 3 and 4:;

Figs. 8, 9, 10 and 11 are detail views of the locking devices for the two shift-keylevers;

Figs. 12 to 16 are after described.

In the drawings annexed, the numeral 15 designates a fiat sheet-metal plate carrying the usual segment 16, this plate being adapted to vertically slide on a pair of vertical posts 17 set in the frame near the back wall thereof. The segment supporting plate 15 has its two end portions bent forwardly and then laterally outward, and the top and bottom edges of the outwardly extending plates of the angular end portions 18 are each provided with a rearwardly-extending car 19 provided with holes through which the 1 views of details hereining the segment-plate with said posts. Each post is fastened rigidly at its upper end to the forwardly-extendingend-portion 20 of a vertical flat plate 21 aifiXed rigidly t0 the back wall of the frame, and each lower end of the post is similarly affixed to a forwardly-extending ear 22 formed integral with said plate 21; and these lower ears 22 are each provided with an inwardly-extending ear 23. In this way, the slidable segment-carrying plate together with its guide-posts form a unitary structure which may be assembled out of the machine and secured as a whole within the frame ofthe machine, thus simplifying manufacture and assembly of the parts.

To raise and lower this segment, I employ a pair of arms 24, one arranged at each side of the machine and connected together at their forward ends by a rock-shaft 25 which extends transversely the full width of the machine-frame. This bar has its reduced pintle-like ends 26 journaled in blocks 27 fastened rigidly to the side-walls of the frame by screws 28; and the arms 24: are fastened to this bar 25 by being provided with a hole which fits the cross-section (preferably rectangular) of said bar, each arm being provided with a pair of ears 29 which are struck up integrally from the sheetmetal arm and are fitted against opposite faces of the bar, where they are suitably fastened as by brazing or welding. The rear end of each arm. 24: is bifurcated to form two fingers 30 which extend through a vertical slot 31 in the front plate of the adjacent angular end portion 18 of the segment carrier and thus form pivotal connection between the arms and the carrier,

cars 32 being struck up from the front plates of said portions 18 of the carrier to provide upper horizontal bearing-faces against which the rounded ends of the upper fingers 30 work in raising the segment. The lower fingers 30 work against cars 19 in pulling the segment down. To normally hold the segment in its upper, normal position, I attach to each of the arms 24 a retractile spring 33, and the other, forward end of each spring is connected to a rigid transverse keylever guide plate 34; by means of a screw 35, this screw affording means of varying the tension of the spring. In this way, the arms 24 are normally drawn upward, thus holdaforesaid posts 17 pass,thus slidingly engagaing the segment in its normal, upper position, in which position the top ears 19 abut solidly against set-screw-stops carried by the upper stationary ears 20. l Vhen the segment is shifted to its lower or figure shiit position, set-screw-stops 37 on the end portions 18 of the carrier strike positively against the ears 23 on bars 21, and thus positively arrest the segment.

To swing down the arms 24- to thus pull down the segment, I employ a pair of keylevers 38 and 39 at each side of the machine, each lever being tulcrumed on a transverse bar 40 afiixed in the machine-it'rame and being provided with a rearwardlyextending finger 4:1 forward of its fulcrum adapted when the key-lever is depressed to strike against the upper side of a lug 6L2 carried by the adjacent one of the arms 2-1: at the rear of the rock shaft 25. ln this way, a depression of any one of the levers 38 or 39 will cause the segment to descend, the duplication of the pairs. of the levers being merely for the purpose of convenience oi the operator. The shiftkey levers are yicldably held in normal position by springs 65 connecting said levers with plate 34-, as shown in Fig. 2.

To wedge and lock the segment in its upper case position, as shown in Figs. 2 and 5, as well as to arrest it in its Cap? shift or intermediate position, I employ the iol lowing devices: A flat bar 43 extending transversely of the machine is provided at its ends with upstanding arms 45A pivoted at 45 (near their lower ends) to uprig t ears 4-6 formed on the lower post-trainecars 22, the pivots L5 permitting the upper ends of the arms to be swung forwardly and rearwardly. Each of the arms is provided with an inwardly-extending lug l? which lies in a substantially horizontal plane in the path of lingers 48, which are virtually extensions beyond the fulcrum 40 of the key-levers, each 01" these fingers being bent upwardly at its rear extremity to lie just under the lug d7, so that vhen the key-lever is operated the linger connected. therewith will bear against the under side of lug l? and thus swing the upper ends oi the stop-arms 44 rearwardly. T he forward edge of each of the lugs 47 is extended upwardly to form an ear 49 which forms a convenient connection for a retractile spring 50 so arranged as to normally pull the stoparms 44 forwardly.

In normal position, stop-arms i l wedge under adjustable stops 51 carried by forwardly-b'ent cars 52 formed on the trout plates of end portions 18 of the segment carrier, the top ends of the arms being each provided with inwardlyextending cars 53 to form broad abutments for engagement with the stop-screws 51, the upper face of each ear 53 being inclined downwardly and forwardly in its normal position so as to eavers wedge and lock the segment in its normal upper position. To arrest the segment in its middle or Cap. shift posit-ion, l provide each of the top ears 19 with an ad justable screw-stop 5% similar in construction to the screw-stops 51, which are adapted respectively to strike against the stop-lugs 53 on the upper ends of the arms 4A- of bail 43, these arms 4A being swung backwardly far enough to bring the lugs 53 directly under said stop-screws 5s by means of the finger 4K8 on either one of the levers 39, the parts being so proportioned as to swing the bail arms 4a to middle position (shown in Figs. 3 and 6) before the segment-carrying plate is pulled down by means of the rock arms 2%.

Fingers 48 attached to the shift-key-levers 38 are slightly longer than the corresponding lingers allixed to the other shift-levers 39, so that when the shiftdevers 38 are ac tuated the bail arms lf-l will be thrown farther back than when actuated by the levers When thus thrown back to the limit of their rearward motion, the hail arms dd will be out of alinement with the steps 54 so that said stop-pins M will pass downwardly in front of the arresting lugs 53, and the segment-carrying plate will be arrested in its downward moiement by the aforesaid stopscrews 37 hereinbefore described.

lt is, oi" course, desirable that the shiftl-:ey-levers 38 and 39 shall be provided with means whereby they may be temporarily locked down, to thereby hold the segment either in middle case position or lower case position. riny suitable devices may be used tor this purpose. I prefer the device shown in Figs. 8 to 11, inclusive. ln this locking mechanism, each or the shift-levers has pivoted to it at 56 an angle-lever 55, one of whose arms 57 extends upwardly and is pro-- vided with a supplemental key 53, and the other of whose arms 59 extends upwardly far enough to swing into contact with and be arrested by the regular key 60 oi the shift-lever whenever said supplemental key 58 is depressed by the operator. Coil-spring 61 serves to hold the supplemental key up and the stop-arm 59 away from its arresti1 key 60. When the shift-lever is depressed through the medium of the supplemental key 58, the angle-lever turns on its pivot 56 until the arm 59 comes against the main key (50; and then, as the shift-lever descends, a lateral lock-lug 62 carried by the arm 57 impinges against the inclined face 63 of a stationary lug 64: (allixed to the frame of the machine) and snaps under the lower edge of said lug G l and thus locks the shift-lever down, the interlocking of the lug 622 with the under edge of lug 6d serving to prevent spring 61 from restoring the angledever to normal position. To release the shift-lever, it is simply necessary to press down slightly on the main key 60, whereupon the lug 62 will be carried down far enough to be released from the stationary l0ck-lug 64:, thereby permitting the spring 61 to restore the supplemental key to normal position with respect to the main key.

The nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

1. A case-shift assembly unit comprising a pair of upstanding brackets having horizontal ears adjacent the upper and lower ends thereof, a pair of vertical guide posts extending between the ears on the brackets and held to said ears, and a vertically slidable support having a pair of vertically spaced horizontal cars at each end thereof slidably held to the posts.

2. A case-shift assembly unit comprising a'pair of flat upstanding brackets provided with integral horizontal ears adjacent the upper and lower ends thereof, a sheet metal vertically disposed plate provided with a pair of superposed integral horizontally disposed ears at each end thereof, a pair of vertical guide posts held at their upper and lower ends to the ears on the brackets and each extending loosely through the adjacent pair of superposed ears on the plate, and a type-bar segment held to the plate.

3. A case-shift assembly unit comprising a pair of upstanding brackets having superposed horizontal ears, a vertical guide post extending between the ears on each bracket and held thereto, a vertically slidable support extending between the brackets and provided at each end with a pair of superposed horizontal ears through which the adjacent guide post extends, the ears on the support being located between the ears on the brackets and cooperating therewith to limit the up and down movement of the support, and a downwardly facing stop carried by one of the upper ears of the support.

4. A case-shift assembly unit comprising a pair of upstanding brackets having superposed horizontal ears, a vertical guide post extending between the ears on each bracket and held thereto, a vertically slidable support extending between the brackets and provided at each end with a pair of superposed horizontal ears through which the adjacent guide post extends, the ears on the support being located between the ears on the brackets and cooperating therewith to limit the up and down movement of the support, a pair of downwardly facing stepped stops carried by one of the upper ears of the support, and a type-bar segment held to the support.

5. A case-shaft assembly unit comprising a pair of upstanding brackets having forwardly extending ears adjacent their upper and lower ends. a flat sheet metal vertically disposed plate having its side edges bent forwardly and then laterally outward, a typebar segment held to the front face of the plate, a pair of vertically spaced horizontal cars extending rearwardly from each outwardly bent end portion of the plate, said outwardly bent end portions of the plate being provided with vertical slots extending between said cars, a third rearwardly extending car on the outwardly bent end portions of the plate above the other ears, the upper and lower ears being provided with apertures out of alinement with the intermediate ears, and a pair of vertical guide posts held to the ears on the brackets and extending through the apertures in the upper and lower ears on the end portions of the plate.

6. A case-shift assembly unit comprising a pair of upstanding brackets having forwardly extending ears adjacent their upper and lower ends, a flat sheet metal vertically disposed plate having its side edges bent forwardly and then laterally outward, a type-bar segment held to the front face of the plate, a pair of vertically spaced horizontal ears extending rearwardly from each outwardly bent end portion of the plate, said outwardly bent end portions of the plate being provided with vertical slots extending between said cars, a third rearwardly extending ear on the outwardly bent end portions of the plate above the other cars, the upper and lower ears being provided with apertures out of alinement with the intermediate ears, and a pair of vertical guide posts held to the ears on the brackets and extending through the apertures in the upper and lower ears on the end portions of the plate, a downwardly extending stop held to each upper ear on the outwardly bent end portions of the plate, and a clownwardly and rearwardly extending stop held to each outwardly bent portion of the plate below the stops on the upper ears.

7. In a typewriting machine, a main frame, a pair of vertical segment-guides and supporting members adapted for attachment to the back-wall of said main frame, a segment-carrying plate slidingly mounted on said guides and arresting stops carried thereby, the segment-arresting device supported on said members, the foregoing parts being attachable to the frame as a unit, and a shift-key mechanism for operating the segment-carrying plate as well as said arresting device.

8. In a typewriting machine, a segmentcarrying plate provided with rearwardlyextending lugs, and shift-key-operated devices for actuating said segment-plate embodying a pair of arms whose rear ends extend rearwardly beyond the face of the segment-plate and engage said lugs.

9. In a typewriting machine, a sheetmetal segment-carrying-plate and means for vertically guiding it in case-shifting, said plate being vertically slotted and provided with rearwardly-extending lugs, and shift-key-operated devices for pulling the plate down embodying a pair of arms whose rear ends extend into said slots and engage said lugs.

10. In a typewriting machine, the combination of a main frame, a type-bar segment support and guiding means therefor removable as a unit from the frame, supportloeking and position-determining means removable from the frame with the support and its guiding means, and key-operated means mounted in the frame for shifting the support and controlling said position-deter mining and support-locking means and separably connected therewith.

11. In a typewriting machine, the combination of a main frame, a type-bar segment support, guiding and arresting means for the support mounted in the frame and removable with the support as a unit from the frame, a rock shaft extending transversely of the frame, bearing for said shaft separably held to the frame, a pair of rock arms rigidly held to the shaft and separably connected with the support, and a pair of shift key levers pivotally supported in the frame and separably connected with one of the rock arms.

12. In a typewriting machine, the combination of a main frame, a type-bar segment support and guiding means therefor removable as a unit from the frame, stops removable with the support and. its guiding means for arresting the support in its uppermost and lowermost positions, a swinging member removable with the support and its guiding; means, stepped stops on the support adapted to be engaged by said swinging member to respectively lock the support in its uppermost position and arrest the support in an intermediate position, a rock shaft extending transversely of the frame and removably supported therein, rock arms extending fore and aft of the frame held to said shaft and having; separably interlocked rocking connections with the support, spring means for normally swinging the rock arms upwardly, and a pair of shift-key levers loosely engaging one of said arms for rocking the arms downwardly and loosely engaging said swinging member and adapted to swing said member different distances from-locking position.

13. In a typewriting machine, the combination of a support shiftable different distances in the same direction from a normal position to vary the relation between printing instrumentalities and aplaten, keyoperated means for shifting the support, means for arresting the support at its normal and maximum case shift positions, a pair of stepped abutments on the support, and a swinging member mounted independently of the support and normally engaging one of said abutments to lock the support in its normal case shift position, said member being shiftable different distances by the key-operated means to move the same either into or out of the path of the other abutment on the support.

14:. Double case shift mechanism for typewriting machines comprisine' a support movable vertically to change case, means for arresting the support in its uppermost and lowermost positions, a pair of stepped abutments on the support, a swinging member mounted independently of the support provided with an abutment normally enone of the abutments on the support to lock the support at one limit of its movement, a pair of shift-keys connected with the support for shifting the same toward the other limit of its movement, and connections between said keys and said member for positioning the member in the path of the other abutment on the support when one key is operated and for shifting the member to an inactive position when the other key is operated.

15. Double case shift mechanism for type writing machines comprising a support shiftable vertically to change case, means for normally moving the support upward, means for determining the uppermost and lowermost positions of the support, a pair of stepped ahutments on the support, an upstand' swinging; arm provided with an abutment normally engaging one of said abutments on the support to lock the support in its uppermost pos ion, and a pair of shift keys operatively connected to shift shift the support downward and adapted to the swinging arm different distances from support-locking position, the abutment on said arm being shifted into the path of the other abutment on. the support when one of the keys is operated to err the support in an intermediate position.

16. Double ease shift mechanism for type writing; machines comprising: a support shiftable vertically to change case, two stepped stops mounted at each end of the support, a bail having upstanding side arms pivotally supported to swing fore and aft of the machine and each provided with a laterally extending projection, 5a spring for rocking the bail in one direction to cause t L1G lugrs on the bail arms to engage under the lowermost stops on the support, means for normally moving the support up 'ard, a pair of shift keys connected with the support for shifting the support downward, and connections between the keys and bail for moving the lugs on the bail arms into the path of the uppermost stops on the support when one key is operated and to move said lugs to inactive position when the other key is operated.

17 In a typewriting machine, the combination of a main frame, a support shiftable vertically to change case, means for guiding the support, a transverse rock shaft journaled in the frame forward of the support, a pair of rock arms held to said shaft at their forward ends and connected at their rear ends with the support, akey-lever guide plate held in the frame forward of the shaft, a pair of coil springs connected with the rock arms and said plate for rocking the arms upward, and a shift-key lever fulcrumed at a point in the frame at the rear of the rock shaft and connected with one of the rock arms at a point intermediate its fulcrum and the rock shaft for shifting the support downward.

18. In a typewriting machine, the combination of a main frame, a support shiftable vertically to change case, means for guiding the support, a transverse rock shaft journaled in the frame forward of the support,

a pair of rock arms held to said shaft at their forward ends and connected at their rear ends with the support, a key-lever guide plate held in the frame forward of the shaft, a pair of coil springs connected with the rock arms and said plate for rocking the arms upward, one of said rock arms having a laterally extending projection at the rear of the rock shaft, a shiftable member for locking the support in its uppermost position and movable to two different positions from its locking position in one of which it is adapted to arrest the support in an in termediate position and in the other of which it permits movement of the support to its lowermost position, a pair of shift key levers fulcrumed at the rear of the projection on the rock arm and overlying said projection, and connections between said levers and members for shifting the mem ber different distances.

This specification signed this 5th day of August A. D. 1919.

EDWIN L. HARMON. 

